package com.qikecn.utils;

import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

public final class HttpClientUtil {
	
	/**
	 * post请求，utf8编码
	 * @param strUrl
	 * @param writeStr
	 * @return
	 */
	public static String simpleHttpPost(String strUrl, String writeStr) {
		URL url = null;
		HttpURLConnection conn = null;
		BufferedReader reader = null;
		BufferedOutputStream out = null;
		try {
			url = new URL(strUrl);
			byte[] writeByte = writeStr.getBytes("UTF-8");
			conn = (HttpURLConnection) url.openConnection();
			conn.setUseCaches(false);
			conn.setConnectTimeout(3000);
			conn.setDoInput(true);
			conn.setDoOutput(true);
			conn.setReadTimeout(6000);
			conn.setRequestMethod("POST");
			//conn.setRequestProperty("Content-Type", "text/html;charset=UTF-8");
			conn.setRequestProperty("Content-Length", String.valueOf(writeByte.length));
			out = new BufferedOutputStream(conn.getOutputStream());
			out.write(writeByte);
			out.flush();
			reader = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
			StringBuffer buffer = new StringBuffer();
			String line = null;
			while ((line = reader.readLine()) != null) {
				buffer.append(line);
			}
			String result = buffer.toString();
			return result;
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		} finally {
			try {
				if(out != null){
					out.close();
				}
				if(reader != null){
					reader.close();
				}
			} catch (Exception e2) {
				// TODO: handle exception
				e2.printStackTrace();
			}
			if (conn != null) {
				conn.disconnect();
			}
		}
	}
	
	
	/**
     * 向指定URL发送GET方法的请求
     * 
     * @param url
     *            发送请求的URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return URL 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param) {
        String result = "";
        BufferedReader in = null;
        try {
            String urlNameString = url + "?" + param;
            URL realUrl = new URL(urlNameString);
            // 打开和URL之间的连接
            URLConnection connection = realUrl.openConnection();
            // 设置通用的请求属性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            // 建立实际的连接
            connection.connect();
            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                System.out.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }

        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return result;
    }
    
}